HOW HIGH AND LOW PRESSURE SAFETY SWITCHES OF A HVAC/ AC SYSTEM WORKS

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How high and low pressure safety works and wired in a HVAC system .. how to install them • HVAC HACKS REPLACING B... #d2dnyac #hvac
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Опубликовано:

10 сен 2024

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Комментарии : 166

@chrisgomez724 3 года назад

This videos is very informative, I do residential so troubleshooting high and low switches would be awesome!! Keep up the good work my man!!

@alfredhines505 3 года назад

At 55psi the circuit will closed and at 30 psi the circuit will open to protect the compressor, due to the low pressure.

@tebbink 5 месяцев назад

Untuk saklar tekanan tinggi berapa range tekanannya?

@bigbite9804 2 года назад

Instead of Removing wire if you switch off condenser fan high pressure going increase then safety switch work perfectly..in same way if you can close high pressure line value then you get low pressure in that way u can check in real time your low pressure switch work perfectly.. this is how we do .. This is my opinion only ..u are doing great work..

@D2DNYAC 2 года назад

Thanks for stopping by, please check my other video on this subject!

@yoshisatoshi3206 4 месяца назад

You'll have a million subscribers in no time. Keep it up !

@BallzToYou7 3 года назад

Thank you so much. You dont understand how perfect and a godsend your channel is right now!!!!!

@hechos1v8 2 года назад

Very professional video. I love the way you explained step-by-step, you make it easy to understand better. Thanks Will B

@D2DNYAC 2 года назад

Thank you for stopping by

@user-om5oz2me8k Месяц назад

Ya Mon you are a great tech. Excellent explanation bro! Bless!!!!

@D2DNYAC Месяц назад

Thank you for stopping by

@krishnasilwal4834 2 месяца назад

Hard to find information RU-vid about this switch. Thank you for information

@D2DNYAC Месяц назад

The switch is simply based on the type of refrigerant inside the system

@chris198004 2 года назад

this could have been a 30 second video but very informative

@D2DNYAC 2 года назад

Thanks for stopping by

@williamtorres810 3 года назад

That was an awesome explanation..I had and RTU that was having pressure switch problem and thanks to this awesome video I was able to pinpoint the issue..Thanks man 👍👍

@andresbarragan8595 4 месяца назад

GOOD MORNING FROM CHICAGO THANK YOU SO MUCH

@D2DNYAC 4 месяца назад

What’s up Chicago , are you guys busy yet?

@josearturobarajas4913 Год назад

I loved the video, it was difficult to find information about this security module and this video is very complete. Greetings engineer 👍🏿

@DWAYNE2ism 4 года назад

Great video really simplified .

@bago49 4 года назад

Good vid bro👍 but waving that highly conductive watch next to those high voltage contactors 😅 had me on edge

@jackbrennan754 3 года назад

Good information my question is how do you replace a high or low pressure switch without losing your refrigerant charge came across this problem.

@mikhailfraser5280 Год назад

You add a swivel tee

@hvacknowledgechannel1621 4 года назад

Nic sharing knowledgeable we should never bypass anyone of them

@samyz1660 2 года назад

Can you please do a video on a sequence of operation for bigger units, like 10, 20 tons please. I'm a new tech trying to learn . I have subscribed to your channel hoping to gain knowledge. Great channel by the way. Thx to RU-vid algorithm who suggested your video.

@ekpenyongakpan149 3 месяца назад

I want to know how a low and high pressure switch is been connected. Thanks

@D2DNYAC 3 месяца назад

I have a video uploaded already check it out

@kerrynball2734 Год назад

All the control circuit is 240V in my AC unit. I'd certainly be taking more care with those connectors an that scenario as they're going to bite a compared to a 24V control circuit.

@D2DNYAC Год назад

Agreed

@Tokenomics1 Год назад

thanks!

@D2DNYAC Год назад

Thanks for watching

@Gabriel-vz7ml Год назад

Thank you!

@D2DNYAC Год назад

Thanks for stopping by

@brunomelvin4233 2 года назад

Yes sir I need thorough expl

@ricardoanguloavila41 Год назад

Hi there! I have a problem with my Package Unit, the Diagnostic Codes for Defrost control Leds is telling me "HIGH PRESSURE SWITCH LOCKOUT" ...

@D2DNYAC Год назад

Are you a hvac technician?

@odeliocepeda6054 3 года назад

In the case of , you come across a bad low pressure switch and don’t have any low pressure switches on hand ,but the unit needs to go up. How do you jump out the switch ? until you go and get a switch

@D2DNYAC 3 года назад

Shunt or splice together the 2 wires leaving the switch

@odeliocepeda6054 3 года назад

Thanks!

@syedbasheer8210 3 года назад

Thanks..

@OthmanAlikhan 2 года назад

Thanks for the video =)

@D2DNYAC 2 года назад

Thank you for stopping by

@benahmedahmed831 Месяц назад

Perblam E2 model SERVICE FIRST Trance Rooftop SENO 1577 et low pression=1bar open

@D2DNYAC Месяц назад

What are you saying?

@benahmedahmed831 Месяц назад

@@D2DNYAC perblam E2

@babaolowo35 2 года назад

Thanks 👍

@D2DNYAC 2 года назад

Thank you for stopping by

@terranhealer Год назад

I have a code 35 error which means a low pressure switch or sensor error. My system doesn’t have a leak though. Is there a way to bypass this faulty switch or sensor?

@D2DNYAC 11 месяцев назад

What system?

@terranhealer 11 месяцев назад

@@D2DNYAC it's an LG mini split

@xraybravo7180 Год назад

Do you know how trane 2 stage packagw unit compressor lockout works ? Apparently I had low pressure got power going in and out however high pressure switch and discharge line snap disk switch didn't have power during compressor lock out.

@D2DNYAC Год назад

Get me the model number and I can tell you

@Yourengineeringstandpt Год назад

Can you tie the hi pressure switch if not one avaliable in a tight spot, sort of like emergency situations

@D2DNYAC Год назад

Can I do what ?

@mithunsha422 3 года назад

Good job bro thx

@D2DNYAC 2 года назад

Thanks for stopping by

@juannanez3969 2 года назад

I just checked for continuity in both my switches. One of them showing there is continuity and the other one showing 400 ohms of resistance. What does that mean? I’m also not getting 24V at the side legs of the contractor, but I am getting the 24V coming from the thermostat.

@D2DNYAC 2 года назад

Replace the switch with the 400 ohs of resistance I would start there!

@krishnaajaayajayaprakas5475 2 года назад

Thanks bro

@D2DNYAC 2 года назад

Thanks for stopping by

@roopramsoeknandan7601 Год назад

I have the same system in my building. So one of my compressor has water inside I had a technician came over telling me that we need to replace a compressor when they come with the new . They told me the heat exchanger has internal leak in there. I just want to know if that’s true

@D2DNYAC Год назад

Doesn't add up !

@AnthonyWilliams-go2tl 3 года назад

Hello I'm having problems with a stand up hvac. I didn't open the door on the back for the fans for the condenser to blow out and it shut the unit down. The reading are at 100psi on the blue side of my gauge.Is there any way to get the presure back down so the hbac can come back on.

@D2DNYAC 3 года назад

Not enough information here for me to advise you!

@D2DNYAC 3 года назад

What manufacturer? What’s the issue or exact problem?

@ras2820 3 года назад

So high pressure switch is pressure is fine the switch remains closed once pressure gets to high switch opens??

@D2DNYAC 3 года назад

👍 yes

@joechambers09 7 месяцев назад

@@D2DNYACis there a way to measure if the high pressure switch is open on a automatic switch

@dbc105 6 месяцев назад

What switches are you using andd where are you getting them?

@D2DNYAC 6 месяцев назад

The switch pressure cut in and cut out rating depends on the refrigerant

@D2DNYAC 6 месяцев назад

Refrigeration or hvac supply house or shops or on the internet

@wdennis8 3 года назад

The pressure switches are running through the coil right? It’s a 24v - 240v switch right? Please explain how you hooked up the wiring for the switch. How does it interrupt the contractor?

@D2DNYAC 3 года назад

I will do another video upload this week on that look out for it

@tafsheeralam9833 3 года назад

Sir i have some issue i instaled compresor nd i try to charge freon but compresor are trip by low pressor switch plss tell me some way to charge freon

@D2DNYAC 3 года назад

What you should do is place the Freon tank in a bucket of hot water or use a heat gun/ blower to warm up the tank this will allow charging while compressor is off best practice.

@user-tg6sg6ho4h 2 года назад

Question: When does the high-pressure sensor disconnect the gas 22

@D2DNYAC 2 года назад

350 to 410 psig depending on the switch

@kellesaereanque2131 Год назад

Is it possible to replace the high pressure switch into one that can be adjustable

@D2DNYAC Год назад

Yes

@kellesaereanque2131 Год назад

@@D2DNYAC thank you so much

@brunomelvin4233 2 года назад

Sir please make vedio on career package Ac using two compressors and the wiring diagram for the lock out relay wiring . Please explain how it's wired and how it works.

@D2DNYAC 2 года назад

Hello friend Do you want to know how the lockout relay works and wired?

@brunomelvin4233 2 года назад

@@D2DNYAC yes sir I need a vedio thoroughly explaining how the lock out circuit works employing two compressors and two lockout relay for two circuits. I am asking you from Bahrain Another vedio on Big career split Ac indoor unit staring with DOL starter wiring diagram. Please I hope you help sir.

@zeke6150 Год назад

Hello sir! Can you make a video searching for leaks in the system? Like the problem is that the unit is not cooling although it's operating? Thank you very much!

@D2DNYAC Год назад

Okay

@joechambers09 7 месяцев назад

@@D2DNYACi have a lennox xp13 system and my green light is blinking showing high pressure fault...my compressor is not coming on and the switch had automatic reset but dint think its resetting...what can i do to reset it

@kashifkerr9309 2 года назад

Can you please make a video on understanding pressures?

@D2DNYAC 2 года назад

Sure thing stay tuned for that

@MangoEnchilada- Год назад

Will the condenser fan still run if the pressure swith trips?

@D2DNYAC Год назад

In some cases yes especially carrier RTU units

@MangoEnchilada- Год назад

I have a lennox 13acx-036-230 13. The entire unit runs and turns on, but it blows hot. Im thinking low refrigerant?

@SharifKhan-yz2er 2 года назад

Thank you so much

@yanheriherlambang8019 3 года назад

How to change oil scroll compresor in tandem sytem.? Thanks a lot.

@D2DNYAC 3 года назад

The easiest way would be to use the oil ports or connecting oil equalizer lines to drain the oils and then refill it through the oil or suction service ports.

@yanheriherlambang8019 3 года назад

@@D2DNYAC Do you have the video..? I wanna see it.Thank you so much.

@mohammadfahimnaimi4222 2 года назад

Brother I need help, my ax unite has a bad high pressure switch how can I replace it and where I can buy it I really need a little help

@D2DNYAC 2 года назад

Where are you located ?

@mohammadfahimnaimi4222 2 года назад

@@D2DNYAC Arizona

@D2DNYAC 2 года назад

Hvac supply store, don't know what's in Arizona!

@D2DNYAC 2 года назад

You will need to know what refrigerant system uses and you can purchase a swivel tee as well and follow my method

@patrickmekus1476 2 года назад

Pls i want to know how each of the switches were connected to the system

@D2DNYAC 2 года назад

the switches are connected in series most of the time!

@sheeesh3355 2 года назад

What should i do if there is no manual reset on pressure switch

@D2DNYAC 2 года назад

Nothing this means the switch will automatically reset once the pressures come down

@joechambers09 7 месяцев назад

@D2DNYAC how do you get the pressure to come down

@patrickl3625 3 года назад

Please Please Please D2D NY … Can you Explain ( What is Restriction T.X.V valve) to Troubleshooting

@D2DNYAC 3 года назад

The TXV creates a controlled pressure difference between the high and low side of your refrigeration system as refrigerant flows through it, when the TXV is restricted that pressure drop becomes uncontrollable thus starving your low side/evaporator of refrigerant Symptoms is low back pressures, most times high head pressure, high suction line temperatures/ super heat, high supply air temperature, poor cooling. Solution replace the valve

@patrickl3625 3 года назад

Can you please shown the video how to troubleshooting The TXV valve restriction

@D2DNYAC 3 года назад

Okay stay tuned

@La2venida 3 года назад

Question: could I bypass the pressure switch, charge the system, and just leave it jump?

@D2DNYAC 3 года назад

Sure, however that’s dangerous to anyone who operates this system and to the system it self, so please don’t

@La2venida 3 года назад

@@D2DNYAC why would it be dangerous to one that operates...are there system s that don't have pressure switchs

@HelloThere-jr6gd 3 года назад

Because if your system does pull a high head pressure or a very low suction pressure the system wont shut off and it will ruin your compressor. Only bypass it if its temporary and you are coming back to fix it later. Dont leave it bypassed.

@D2DNYAC 3 года назад

It’s not dangerous to one that operates however if you bypass the high pressure switch you can definitely ruin your compressor bypassing the low pressure switch isn’t too bad however you can still ruin your compressor if the system freezes up and slug liquid refrigerant back to compressor. If you must only do it during troubleshooting or in an emergency if the switch or switches is faulty and system pressures are okay. And return and remedy ASAP.

@tserevenad 2 года назад

My compressor won't run, won't make a noise. wondering about pressure switches. But, condenser fan does run, thus contactor working. If my logic is right, per your video, my pressure switches must be ok. worth noting I have a defrost board could that matter. thanks.

@D2DNYAC 2 года назад

@Tserevenad if you have a residential split system and the fan on top of the outdoor unit spins, and compressor doesn’t run it seems like your compressor is bad!

@D2DNYAC 2 года назад

In this case for 1PH units a hard start kit my help!

@tserevenad 2 года назад

@@D2DNYAC yes I have a stains you describe. I used my ohmmeter to check coil winding. Shorts to ground and a stuck overload switch. Everything perfect. Can compressor be bad if electrical tests are good. Doesn’t blow fuses either. Also cap and contractor measure/working properly. I am thinking something going on with defrost board and sensor but not clear on why it would make compressor not run. Thanks for your thoughts.

@D2DNYAC 2 года назад

Then if this is the case typically the fan and compressor shares the same contactor the compressor 1PH compressor is seized, try using a hard start kit /capacitor sometimes this will get compressor going, you can also send me a picture of your ac unit and wiring diagram on (what’s app) so I can better assist!

@tserevenad 2 года назад

@@D2DNYAC appreciate your help. I just reread my last text and it is nonsense so I need to give you correct info. I need to setup WhatsApp on my phone and reach out to you again this afternoon. Thanks.

@justinhinds4388 Год назад

I want to know what capacitor and transformer does?

@D2DNYAC Год назад

Transformer lower the incoming line voltage to control voltage 460/208/120 volts to 24 volts, capacitor is used on single pashas motors/ compressors to increase starting and running power

@user-ge9on2zz4g Год назад

How do you know if the pressure sensor is broken or working?

@D2DNYAC Год назад

They are typically normally closed switches, when system pressure is good, and opened if faulty or if system has a problem

@user-ge9on2zz4g Год назад

@@D2DNYAC Under normal circumstances, is there electricity at one corner or both corners?

@itsmeagain6168 3 года назад

Big up

@janjantagud9918 3 года назад

How to by pass high pressure switch?

@D2DNYAC 3 года назад

Don’t recommend this unless you are troubleshooting!

@D2DNYAC 3 года назад

Don’t recommend unless troubleshooting , however you can bypass by cutting both wires connected to the switch, then strip and connect both wire going back into the controls together

@janjantagud9918 3 года назад

But the pressure switch has three wires... 😭

@theodoe5425 3 года назад

I wanna know more about the time delay

@theodoe5425 3 года назад

I wanna know more about the time delay.

@D2DNYAC 3 года назад

Okay I will do a video on it or incorporate it into another video. Stay tuned for that

@danielobethlopezdelgado5059 Год назад

Acapulco

@D2DNYAC Год назад

English please

@ras2820 3 года назад

Is the high pressure switch the same as the high pressure control

@D2DNYAC 3 года назад

No!

@ras2820 3 года назад

@@D2DNYAC ok so if you don't mind me asking what is the high pressure control thank you?

@D2DNYAC 3 года назад

😂 a device that controls the head pressure. There is various types I have a video on type of head pressure control device! I will link it below👇🏻👇🏻👇🏻video

@D2DNYAC 3 года назад

HEAD PRESSURE CONTROL VALVE / HPCV/ HEAD MASTER HOW TO INSTALL & WHAT IS IT?

@D2DNYAC 3 года назад

In my video title above is one type of head pressure control device. Examples of others are Variable frequency drives, fan cycling switches, motorized dampers, motorized valves

@Toylakwatsero 3 года назад

What is the purpose of contactor sir?

@D2DNYAC 3 года назад

@ abet lakwatsero It is an electronic switch which is controlled by your thermostat , the thermostat passed low or controlled voltage usually 24V to the contactor coil then the switching section of contactor then pass high voltage to the load compressors and fan motors to put it simply, it can get more complex

@Toylakwatsero 3 года назад

@@D2DNYAC Thank you for information sir God Bless

@aripapari9226 2 года назад

Can I call you for service? I’m in queens NY

@D2DNYAC 2 года назад

Sure thing

@jessuezhernandez1991 Год назад

My A/C works but the won't switch over to blow out heat? What could be the issue? We had someone come change out our pressure switch and The heater went out... any tips or advice you can give me ? I'd appreciate it

@D2DNYAC Год назад

In the case of a heat pump it’s either the thermostat configuration/wiring or a bad reversing valve in the case of other heating systems type pressure switch on AC would have no impact on heating

@lyotoarellano 2 года назад

Do you respond to questions?

@D2DNYAC 2 года назад

Always

@D2DNYAC 2 года назад

What’s yours?

@PBS-nm1uu Год назад

bad camera angle

@D2DNYAC Год назад

What didn't you not see ?

@dwmcever 3 года назад

Worked in refineries and chemical plants most of my life, you're not allowed to wear watches or rings of any kind or Jewelry period . Doesn't matter your rank or craft. Those Blue Gloves and grabbing HOT WIRES are going to get this guy killed. Yes I am an expert, Senior V.P. Engineering (retired). Couldn't get past the safety issues here to watch the video for content. Had he been one of my employees he would have been suspended until he attended required safety classes.

@D2DNYAC 3 года назад

Hey 👋 thanks for stopping by! 🤔l understand and knows all the risks involved with the job however things are different inside of a plant that’s a controlled environment out here in HVAC you are going to have to troubleshoot live circuits and I have yet to see anyone got suited up to do so., I am a pro and knows and understand what I am doing and I can assure you after 17 yrs in the industry I will not be killed by the HVAC trade craft🤫😂